Summary
This document announces the reopening of the comment period for the above-referenced NPRM, which proposed the adoption of a new airworthiness directive (AD) that applies to all The Boeing Company Model MD-90-30 airplanes and that would supersede AD 97-11-07 and AD 99-18-23. The NPRM proposed to continue to require revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to incorporate certain compliance times for principal structural elements (PSE) inspections and replacement times for safe-life limited parts. The NPRM also proposed to require revising the maintenance or inspection program to incorporate a new PSE requirement for the rear spar caps of the horizontal stabilizer and its associated inspections. This reopening of the comment period is necessary to ensure that all interested persons have ample opportunity to submit any written relevant data, views, or arguments regarding the proposed requirements of the NPRM.